Modelling impervious pavements with the Low Impact Development module of the Storm Water Management Model
Date
2021-02-12Author
Almandoz Berrondo, Francisco Javier
Andrés-Doménech, Ignacio
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6th IAHR Europe Congress, Warsaw, Poland 2020. Abstract book : 806-807 (2021)
Abstract
During the last few decades, resolution for hydrologic models has increased considerably. In addition, the
growing development of Sustainable Urban Drainage Systems (SUDS) has led to the implementation of new
parameters and modules in those models. For example, Storm Water Management Model (SWMM)
implemented the Low Impact Development (LID) module, which is designed to model SUDS techniques.
However, hydrological modelling with the LID module presents relevant differences from the general
SWMM model procedure. This research proposes a new approach for modelling the hydraulic response of
impervious pavements in urban areas, based on the model provided by the SWMM LID module, instead of
the general model. Results show that, when modelling with the SWMM LID module, it is possible to obtain
runoff hydrographs that match those obtained by the general SWMM model, modifying just one parameter:
the pavement permeability. This approach would be useful to compare alternatives that can be implemented
in a given area by modifying only one model parameter. It would be possible to switch from pervious to
impervious surfaces without changing the model itself.